Thank you very much for your suggestions.
We have sniffed the packets using Ethereal 0.9.16, and now it's even more puzzling. I am not even sure the weirdness has anything to do with the gatekeeper. For simplicity, we ran with H245Routed=0. All stages involving GK go fine; then the endpoints make direct connection for H.245, everything goes fine until "open logical channel". We have an OKI on one side and a Cisco ATA186 on the other. Let's say the ATA calls the OKI:
...
ATA -> OKI: openLogicalChannel
ATA <- OKI: openLogicalChannelAck
ATA <- OKI: openLogicalChannel
OKI -> ATA: openLogicalChannelReject: multicast is not allowed
What's weird, RTP packets are coming both directions. I think it might mean fast-start, but I have specifically disabled it.
All other interworking combinations: ATA-ohphone, ATA-NetMeeting, OKI-ohphone, OKI-NetMeeting, OKI-OKI, all go fine.
Hmm. OK, maybe there is something with the interworking between the OKI and the Cisco, so I try it also with MultiVoIP 800. Here comes the weirdest thing: opening logical channel always succeeds, I can always hear what's coming into the MultiVoIP, but never in the direction from MultiVoIP to OKI or Cisco, and the payload type of the RTP packets is UNKNOWN(104) as shown in Ethereal. I have tried with all available codecs, same thing. I know for a fact this is not just Ethereal not knowing about codecs, because it shows all kinds of G.* payload coming from the other devices, just fine. Means the MultiVoIP really sends weird RTP packets down the wire... but this does not make any sense, does it???
I am buffled...
Boris
P.S. I have tried your suggestion about GnuGK 2.0.5 instead of 2.0.6, same thing it seems.
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